Why were mutations needed for the species of moth to survive during the Industrial Revolution in London?

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."